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Secure+ transfers return error message "No trusted certificate found"

During the initial part of a secure connection, the client makes a connection to the server, the SSL/TLS handshake begins, and the server will send back the public portion of the system certificate designated for that trading partner or connection. The client software will then compare this public certificate against it's trusted certificate store and match it against a certificate and/or certificate chain. If there is nothing that matches it, the you will receive the error message "No trusted certificate found". This means that the client did not receive the expected certificate/certificate chain back.

To diagnose the issue, you'll want to check exactly what certificate is being passed back from the server and verify that this same certificate/certificate chain is stored in the trusted certificate store, and update the certificates that are in error.